What is Demifluid gender?

I’m confused about my gender and I don’t know what to do. I’ve always been cisgender, but technically I never got a say in how I want to define myself. I’m happy with she/her pronouns, though I’m thinking I wouldn’t mind they/them, since it’s neutral. What is Demifluid gender? I recently heard about this identity and i think it kinda clicked with me. I believe it’s when part of your gender always stays the same while the other part is more fluid. For me, I’m always a woman, but there’s this non-binary/genderqueerness that I think is present in a fluid way. But then I think I’m just trying to be different and making it up? Is it possible to be partly cisgender, and partly non-binary? And Is it possible my gender expression is drives my gender identity?